Electromagnetic wave trapping in the split-ring-cavity system

The single split-ring magnetic and/or electric dipole moments attaining large values at resonance ensure trapping electromagnetic wave energy in the near-field space of the ring, and in the cavity created by the ring and a reflecting wall. The self-formation of coupled resonators system manifests in sharpening the resonance. Resonance broadening to a forbidden band is proved to arise in the array of split rings ensuring bandstop filter applications. Simulation data on the field amplitude distribution and frequency domain are proved to be in reasonable agreement with experiments.